The paper submitted for publication will document the process taken to revise the unloading pit section of the AREMA manual. The original section on unloading pits was incorporated into the Manual in 1993. Upon review of Section 8.4 for reaffirmation in 2010, it was determined that the figures in section were developed prior to the implementation of the alternate loading and the concrete figures should be removed from Chapter 15. Figures 15-8-5 and 15-8-6 were reviewed in relation to current live load and fatigue criteria specified in Section 1. The documentation will include commentary of the history of the section, steps take to revise the section, and the detailed calculations required to make the table changes.
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